Tutorial 08: analogRead() and the Serial Port: Arduino Course for Absolute Beginners (ReM)

This tutorial covers the use of analog inputs on an Arduino board, focusing on the analog read function. It explains the setup of a simple circuit using a potentiometer and how to read varying voltage levels. The tutorial also walks through the Arduino sketch, detailing the code structure and the role of the analog read function. Finally, it demonstrates how to test the circuit and observe the results using the serial monitor.

What is the main difference between digital and analog signals?

• Digital signals are continuous, while analog signals are discrete.

• Analog signals have a range of values, while digital signals are binary.

• Digital signals have a range of values, while analog signals are binary.

• Analog signals are used for communication, while digital signals are not.

Which component acts as a voltage divider in the circuit setup?

• Jumper wires

• Arduino board

• Breadboard

• Potentiometer

What is the purpose of the analog read function in Arduino?

• To convert digital signals to analog signals

• To read voltage at digital pins

• To convert analog signals to digital values

• To control the power supply

What range of integer values does the analog read function return?

• 0 to 65535

• 0 to 4095

• 0 to 1023

• 0 to 255

In the Arduino sketch, what is the role of the 'sensorValue' variable?

• It stores the digital pin number.

• It holds the integer value returned by analog read.

• It sets the baud rate for serial communication.

• It initializes the Arduino board.

What is the purpose of the 'Serial.begin' function in the setup block?

• To begin serial communication

• To initialize the potentiometer

• To start the Arduino board

• To set the voltage level

How does the potentiometer affect the readings in the Arduino sketch?

• It alters the power supply to the Arduino.

• It changes the baud rate.

• It adjusts the voltage applied to the analog pin.

• It modifies the digital pin configuration.

What is the purpose of the 'Serial.println' function in the loop block?

• To print the sketch code

• To set the voltage level

• To display the potentiometer's position

• To initialize the Arduino board

What happens when the potentiometer is turned all the way to the right?

• The reading is 512.

• The reading is 2048.

• The reading is 0.

• The reading is 1023.

What is a potential application of the analog read function?

• Controlling digital signals

• Measuring light intensity

• Setting up digital pins

• Configuring the Arduino IDE